The innovative vehicle architecture of the BMW i8 comprises two elements: the Life module, the passenger cell made of carbon fiber reinforced plastic (CFRP), and the aluminum Drive module, which incorporates the entire drivetrain and chassis technology. The LifeDrive concept and use of CFRP allows production times to be cut by half compared to those required for an equivalent car built along conventional lines. The process is less investment intensive as the high costs required for a conventional press shop and paint shop are no longer an issue and the Life and Drive modules can be manufactured alongside one another.

BMW i8 uses a plug-in hybrid system consisting of a turbocharged three-cylinder BMW TwinPower Turbo petrol engine and BMW eDrive technology in the form of an electric drive system. The 1.5-liter combustion engine develops 170 kW/231 hp and drives the rear wheels of the BMW i8, while the 96 kW/131 hp electric drive sends its power to the front wheels and allows an all-electric range of up to 35 kilometers (22 miles) and a top speed of 120 km/h (75 mph).